TRIUMPH STAG MOT pass rate
83.4% of 1,863 TRIUMPH STAG MOT tests pass.
At 83.4%, The STAG passes slightly less often than the average across all TRIUMPH models (85.5%).
The TRIUMPH STAG has a pass rate of 83.4%, a little higher than the national average for cars (79.2%).
Own this TRIUMPH STAG?
This is the average across every TRIUMPH STAG in the dataset. Look up your own registration for its actual MOT history, and a free place to keep its maintenance records.
How to check and keep your TRIUMPH’s service history →
Pass rate by vehicle age
| Vehicle age | Pass rate | Tests | Average mileage |
|---|---|---|---|
| 0–3 years | no tests recorded | 0 | no reading |
| 3–6 years | too few tests (2) | 2 | no reading |
| 6–10 years | no tests recorded | 0 | no reading |
| 10–15 years | no tests recorded | 0 | no reading |
| 15+ years | 83.3% | 1,861 | 51,758 miles |
Common MOT failure reasons for the TRIUMPH STAG
The most common reason the TRIUMPH STAG fails its MOT is lamps, reflectors and electrical equipment — present in 76.2% of failed tests, most often logged as "Not working".
| Category | Share of failed tests | Example |
|---|---|---|
| Lamps, reflectors and electrical equipment | 76.2% | Not working |
| Brakes | 47.3% | Efficiency below requirements |
| Suspension | 28.4% | Prescribed area excessively corroded significantly reducing structural strength |
| Visibility | 23.8% | Not working |
| Body, chassis, structure | 19.4% | Or chassis has excessive corrosion, seriously affecting its strength within 30cm of a body mounting |
| Noise, emissions and leaks | 14.5% | Emissions carbon monoxide content excessive |
| Steering | 13.9% | Gaiter missing or no longer prevents the ingress of dirt |
| Seat belts and supplementary restraint systems | 3.8% | Anchorage loose |
| Tyres | 3.6% | Tread depth below requirements of 1.6mm |
| Identification of the vehicle | 0.5% | Insecure |
Related TRIUMPH models
- TRIUMPH TR6 — 87.8% pass rate
Frequently asked questions
- What is the MOT pass rate for the TRIUMPH STAG?
- 83.4% of TRIUMPH STAG MOT tests pass, based on 1,863 tests in the DVSA anonymised MOT tests and results dataset.
- What are the most common MOT failures for the TRIUMPH STAG?
- The most common reason the TRIUMPH STAG fails its MOT is lamps, reflectors and electrical equipment — present in 76.2% of failed tests, most often logged as "Not working".
- Does this show the TRIUMPH STAG's service history?
- No — this is MOT test data, which covers roadworthiness, not servicing. A service history is a separate record of maintenance work, which a specific car only has if its owner has kept it. See the TRIUMPH service history guide for how to check and keep one.